diff --git a/frontend/css/style.css b/frontend/css/style.css
index 107e11b..5cbbb7e 100644
--- a/frontend/css/style.css
+++ b/frontend/css/style.css
@@ -559,6 +559,38 @@ body.theme-light .input-row input:focus {
     background: var(--bg-tertiary);
 }
 
+.setting-item input[type="range"] {
+    width: 100%;
+    appearance: none;
+    -webkit-appearance: none;
+    height: 6px;
+    border-radius: 999px;
+    background: var(--bg-tertiary);
+    border: 1px solid var(--border);
+    cursor: pointer;
+    margin: 6px 0;
+}
+
+.setting-item input[type="range"]::-webkit-slider-thumb {
+    -webkit-appearance: none;
+    appearance: none;
+    width: 18px;
+    height: 18px;
+    border-radius: 50%;
+    background: var(--text-primary);
+    border: none;
+    cursor: pointer;
+}
+
+.setting-item input[type="range"]::-moz-range-thumb {
+    width: 18px;
+    height: 18px;
+    border-radius: 50%;
+    background: var(--text-primary);
+    border: none;
+    cursor: pointer;
+}
+
 .setting-item select {
     width: 100%;
     padding: 9px 12px;
@@ -872,11 +904,11 @@ body.theme-light .setting-item select option {
     }
 
     .video-card h4 {
-        font-size: 16px;
+        font-size: calc(16px * var(--card-font-scale, 1));
     }
 
     .video-card p {
-        font-size: 13px;
+        font-size: calc(13px * var(--card-font-scale, 1));
     }
 }
 
@@ -989,7 +1021,7 @@ body.theme-light .setting-item select option {
 }
 
 .video-card h4 {
-    font-size: 15px;
+    font-size: calc(15px * var(--card-font-scale, 1));
     font-weight: 500;
     padding: 12px 12px 10px;
     line-height: 1.3;
@@ -1022,7 +1054,7 @@ body.theme-light .setting-item select option {
 }
 
 .video-card p {
-    font-size: 12px;
+    font-size: calc(12px * var(--card-font-scale, 1));
     color: var(--text-secondary);
     padding: 0 12px 12px 12px;
     margin: 0;
@@ -1040,7 +1072,7 @@ body.theme-light .setting-item select option {
 }
 
 .video-tag {
-    font-size: 11px;
+    font-size: calc(11px * var(--card-font-scale, 1));
     color: var(--text-secondary);
     background: var(--bg-tertiary);
     border: 1px solid var(--border);
diff --git a/frontend/index.html b/frontend/index.html
index ca81573..9707949 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -98,6 +98,14 @@
                     <option value="compact">Compact</option>
                 </select>
             </div>
+            <div class="setting-item">
+                <label for="card-size-range">Card Size</label>
+                <input type="range" id="card-size-range" min="0.7" max="1.5" step="0.1" value="1">
+            </div>
+            <div class="setting-item">
+                <label for="text-size-range">Text Size</label>
+                <input type="range" id="text-size-range" min="0.8" max="1.4" step="0.1" value="1">
+            </div>
             <div class="setting-item">
                 <label for="feed-end-select">Reels: On Video End</label>
                 <select id="feed-end-select">
diff --git a/frontend/js/main.js b/frontend/js/main.js
index c86fde3..0688077 100644
--- a/frontend/js/main.js
+++ b/frontend/js/main.js
@@ -8,6 +8,9 @@ window.App = window.App || {};
         App.ui.applyPreferredQuality();
         App.ui.applyFeedEndBehavior();
         App.ui.applyDensity();
+        // Set the text-size CSS variable before the first pack so initial card
+        // heights are measured at the user's chosen size.
+        document.documentElement.style.setProperty('--card-font-scale', App.storage.getFontScale());
         App.ui.renderMenu();
         App.favorites.renderBar();
         App.ui.bindGlobalHandlers();
diff --git a/frontend/js/storage.js b/frontend/js/storage.js
index 7d6e9bb..0675c19 100644
--- a/frontend/js/storage.js
+++ b/frontend/js/storage.js
@@ -57,6 +57,30 @@ App.session = App.session || {};
         localStorage.setItem('density', nextDensity === 'compact' ? 'compact' : 'comfortable');
     };
 
+    // User-tunable card width / text size multipliers (default 1.0). Clamped so a
+    // stale or hand-edited value can never break the layout.
+    const clampScale = function(value, min, max, fallback) {
+        const n = parseFloat(value);
+        if (!isFinite(n)) return fallback;
+        return Math.min(max, Math.max(min, n));
+    };
+
+    App.storage.getCardScale = function() {
+        return clampScale(localStorage.getItem('cardScale'), 0.7, 1.5, 1);
+    };
+
+    App.storage.setCardScale = function(next) {
+        localStorage.setItem('cardScale', clampScale(next, 0.7, 1.5, 1));
+    };
+
+    App.storage.getFontScale = function() {
+        return clampScale(localStorage.getItem('fontScale'), 0.8, 1.4, 1);
+    };
+
+    App.storage.setFontScale = function(next) {
+        localStorage.setItem('fontScale', clampScale(next, 0.8, 1.4, 1));
+    };
+
     App.storage.getServerEntries = function() {
         const config = App.storage.getConfig();
         if (!config.servers || !Array.isArray(config.servers)) return [];
diff --git a/frontend/js/ui.js b/frontend/js/ui.js
index d48aa7d..4cef70f 100644
--- a/frontend/js/ui.js
+++ b/frontend/js/ui.js
@@ -28,6 +28,29 @@ App.ui = App.ui || {};
         if (select) select.value = density;
     };
 
+    // Card Size: re-packs the virtual grid (column count derives from the scaled
+    // minimum card width in videos.js).
+    App.ui.applyCardScale = function() {
+        const scale = App.storage.getCardScale();
+        const range = document.getElementById('card-size-range');
+        if (range) range.value = scale;
+        if (App.virtualGrid && typeof App.virtualGrid.relayout === 'function') {
+            App.virtualGrid.relayout();
+        }
+    };
+
+    // Text Size: drives the --card-font-scale CSS variable; a re-pack follows so
+    // card heights account for the new text size.
+    App.ui.applyFontScale = function() {
+        const scale = App.storage.getFontScale();
+        document.documentElement.style.setProperty('--card-font-scale', scale);
+        const range = document.getElementById('text-size-range');
+        if (range) range.value = scale;
+        if (App.virtualGrid && typeof App.virtualGrid.relayout === 'function') {
+            App.virtualGrid.relayout();
+        }
+    };
+
     // Toast helper for playback + network errors.
     App.ui.showError = function(message) {
         const toast = document.getElementById('error-toast');
@@ -305,6 +328,24 @@ App.ui = App.ui || {};
             };
         }
 
+        const cardSizeRange = document.getElementById('card-size-range');
+        if (cardSizeRange) {
+            cardSizeRange.value = App.storage.getCardScale();
+            cardSizeRange.oninput = () => {
+                App.storage.setCardScale(cardSizeRange.value);
+                App.ui.applyCardScale();
+            };
+        }
+
+        const textSizeRange = document.getElementById('text-size-range');
+        if (textSizeRange) {
+            textSizeRange.value = App.storage.getFontScale();
+            textSizeRange.oninput = () => {
+                App.storage.setFontScale(textSizeRange.value);
+                App.ui.applyFontScale();
+            };
+        }
+
         const feedEndSelect = document.getElementById('feed-end-select');
         if (feedEndSelect) {
             feedEndSelect.value = App.storage.getFeedEndBehavior();
diff --git a/frontend/js/videos.js b/frontend/js/videos.js
index 2577546..79e34ae 100644
--- a/frontend/js/videos.js
+++ b/frontend/js/videos.js
@@ -565,6 +565,7 @@ App.videos = App.videos || {};
         const measureMetrics = function() {
             const el = grid();
             if (!el) return false;
+            const phone = window.matchMedia('(max-width: 480px)').matches;
             const mobile = window.matchMedia('(max-width: 768px)').matches;
             const large = window.matchMedia('(min-width: 1600px)').matches;
             gap = mobile ? 12 : (large ? 24 : 16);
@@ -580,8 +581,12 @@ App.videos = App.videos || {};
             if (inner <= 0) return false;
             // Density toggle (see enhance.js / settings) tunes the minimum card
             // width, so "compact" packs more columns at the same viewport width.
-            const minCardW = document.body.dataset.density === 'compact' ? 210 : 260;
-            cols = mobile ? 2 : Math.max(1, Math.floor((inner + gap) / (minCardW + gap)));
+            // The user's Card Size setting scales that minimum on top of density.
+            const cardScale = (App.storage && App.storage.getCardScale) ? App.storage.getCardScale() : 1;
+            const minCardW = (document.body.dataset.density === 'compact' ? 210 : 260) * cardScale;
+            // One card per row on phones, two on larger handsets/tablets, and a
+            // size-driven count on desktop.
+            cols = phone ? 1 : (mobile ? 2 : Math.max(1, Math.floor((inner + gap) / (minCardW + gap))));
             colWidth = (inner - gap * (cols - 1)) / cols;
             return true;
         };